SET @save_binlog_commit_wait_count= @@GLOBAL.binlog_commit_wait_count;
SELECT @@GLOBAL.binlog_commit_wait_count as 'must be zero because of default';
must be zero because of default
0
SELECT @@SESSION.binlog_commit_wait_count  as 'no session var';
ERROR HY000: Variable 'binlog_commit_wait_count' is a GLOBAL variable
SET GLOBAL binlog_commit_wait_count= 0;
SET GLOBAL binlog_commit_wait_count= DEFAULT;
SET GLOBAL binlog_commit_wait_count= 10;
SELECT @@GLOBAL.binlog_commit_wait_count;
@@GLOBAL.binlog_commit_wait_count
10
SET GLOBAL binlog_commit_wait_count = @save_binlog_commit_wait_count;